I tend to be critical when it comes to beta-reading other stories but not so much to the point where I break the author's heart because they think I'm firing back at them for being a bad writer. I also look for the author's voice andwould like it if people stick to certain plot instead of all over the place. I also like it when the author is very detailed in his/her work. That's how I imagine the scene going and I am a very imaginative person when I'm reading sometimes losing track of space and time. I want to read stories that make sense and go along with the storyline and the main fandom.
I am wonderful at catching grammar/ punctuation errors. I am an awesome speller and keep an eye out for mistakes. I also can make out the author's voice (how they word the story) and find ways to make their story more interesting (for example 'using other words than said or big'.) I also excel at finding OOC (out of character) characters. I read in the slow range so I can capture every word and try my hardest to pay attention to the flow and structure of a story.
I love reading but I get bored sometimes if the story has too many words or chapters (ex: 10,000 words or 54 chapters,etc.). I also overlook some common mistakes sometimes but not to the point where I can't spot anything. Another weakness of mine is grammar that I can spot easily but hard to fix (if you understand what I mean).
The romance, action, drama, and hurt/comfort are some story genres I would prefer over others but I can still read things like friendship and family, etc. I'm just really into the Shoujo-type genres and very limited Shonen-type genres. I excel at romance stories. I also have a very limited choice of Mecha/ Sci-fi stories. Fantasy and Supernatural are definitely for me! Oh and I absolutely love stories with pairings like canon x OC (mainly stories with OCs in them).